Research Areas - (2) Spin-Electric Coupling in Molecular Magnets

Full path: Physics > Quantum Information / Computing > Spin Qubits > Molecular Spin Qubit Quantum Sensing > Pulsed EPR Molecular Qubit Coherence > Spin-Electric Coupling in Molecular Magnets

Arzhang Ardavan 🔗
University of Oxford 🔗
Research areas:
Techniques:
Tags:
Department(s)/lab(s): Physics (Condensed Matter Physics Sub-department) | Quantum Spin Dynamics Group @ Oxford
Summary:

Ardavan leads the Quantum Spin Dynamics group, studying quantum coherent phenomena in condensed matter. Central to the lab's quantum sensing relevance: (1) molecular spin qubits — using pulsed EPR/DEER to characterise and control multi-spin registers ({Cr7Ni} molecular rings, nitroxide radical chains) assembled into qubit networks, measuring coherence times, inter-qubit couplings, and demonstrating spin-electric coupling in molecular magnets; (2) DNA-assembled molecular quantum devices — using DNA nanostructures to precisely position molecular spin qubits for multi-qubit sensing and quantum information applications; (3) surface atom spin resonance — STM-based coherent spin control of individual atoms on surfaces at nanosecond timescales. Uses X-band through W-band pulsed EPR at Centre for Advanced Electron Spin Resonance (CAESR), Oxford.

Joris van Slageren 🔗
University of Stuttgart 🔗
Research areas:
Techniques:
Tags:
Department(s)/lab(s): Institute of Physical Chemistry | van Slageren Group - Molecular Quantum Spintronics @ Stuttgart
Summary:

van Slageren's group is one of the leading molecular-qubit labs. They synthesize their own paramagnetic molecules, characterize them with a wide spectroscopic and magnetometric arsenal (multi-frequency and high-field EPR, pulsed EPR/DEER, THz spectroscopy, SQUID magnetometry) and back it with ab-initio calculation. Landmarks include room-temperature quantum coherence in a copper(II) molecular qubit, quantitative prediction of nuclear-spin-diffusion-limited coherence times, measurement of coherence in thin films without post-processing, and recent observation of a sizeable spin-electric effect -- electric-field control of a molecular spin state, which is the mechanism you would exploit for a molecular electrometer. Current direction: molecular quantum spintronics, marrying organic spintronics to molecular magnetism. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), this is the molecular alternative to the diamond defect: chemically tunable spin qubits whose coherence can be engineered by ligand design rather than by host-crystal purification. Immediate neighbours are Krueger (nanodiamond chemistry) and Wrachtrup (NV readout), both already on file -- an unusually complete local ecosystem.